Comportamiento de una Mezcla Densa en Caliente Elaborada con Asfaltos Modificados con Asfaltita

Abstract

Laboratory tests were used to evaluate the effect on the mechanical properties of a hot asphalt mix (MDC-2 as per INVIAS, 2007 specifications) due to the addition by wet way of a natural asphaltite from the San Alberto Mine (Santander, Colombia). The strength under monotonic load, resilient modulus and rutting were evaluated. Two asphalt cements (CA) were used, CA 80-100 from the Barrancabermeja refinery (Colombia) and CA 60-70 from Apiay (Colombia). The results show that the mechanical properties evaluated were higher for the MDC2 mixes modified with asphaltite compared with mixtures with asphalts without additives. Additionally penetration tests at different temperatures and softening points were conducted on asphalt cementswith and without additive. The asphaltite produces higher penetration resistance and lower thermal flow susceptibility.